Choose the incorrect formula out of the four compounds for an element X below :
- $X_2Cl_3$
- $X_2O_3$
- $X_2(SO_4)_3$
- $XPO_4$
The Correct Option is A
Solution and Explanation
$X_{2}Cl_{3} \Rightarrow X^{3+}Cl^{2-}$
$X_{2}\left(SO_{4}\right)_{3} \Rightarrow X^{3+}SO_{4}^{2-}$
$XPO_{4} \Rightarrow X^{3+}PO_{4}^{3-}$
Because $Cl^{2-}$ does not exist. So, $X_{2}Cl_{3}$ is incorrect. The correct formula should be $XCl_{3}.$
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Concepts Used:
Some Basic Concepts of Chemistry
Chemistry is a vast subject and for understanding its significance we can take help of following points:
- Chemistry plays an important role in understanding various subjects like physics, geology and biology.
- Chemistry is a core branch of science that explains us about the various compositional properties and interaction of matter. It also helps to understand various chemical reactions.
- Chemistry is important in order to understand the behaviour of fertilizers, alkenes, acids, salts, dyes, polymers, drugs, soaps and alloys in organic and inorganic chemistry.
- Chemistry plays an important role in various fields like healthcare, industrial, research, food, and farm activities.
Read More: Some Basic Concepts of Chemistry
Classification of Matter
There are two ways of classifying the matter:
(A) Physical Classification:
Matter can exist in three physical states:
- Solids - have definite volume and definite shape
- Liquids - have definite volume but not definite shape.
- Gases - have neither definite volume nor definite shape.
(B) Chemical Classification:
Based upon the composition, matter can be divided into two main types:
- Pure Substances are defined as a single substance (or matter) which cannot be separated by simple physical methods. Pure substances can be further classified as (i) Elements (ii) Compounds
- Mixtures are the combination of two or more elements or compounds which are not chemically combined together and may also be present in any proportion.